Keploy
AI-powered test generation and record-replay testing tool. Keploy captures real API traffic and automatically generates integration tests + mocks/stubs from captured traffic. Uses eBPF for network-level traffic capture (no code changes needed). When re-run, Keploy replays the captured API calls against your application and mocks external dependencies. Designed to dramatically reduce the effort of writing integration tests for backend services.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Apache 2.0 open source. Recorded traffic may contain sensitive data — test recordings must be sanitized before committing to git. eBPF-level access requires elevated privileges — run in isolated test environments only.
⚡ Reliability
Best When
You want to generate integration tests from real traffic with minimal effort — especially for existing backend services that lack test coverage.
Avoid When
You need fine-grained control over test logic, front-end testing, or performance testing — specialized tools are more appropriate.
Use Cases
- • Generate integration tests automatically by recording real API traffic to your backend — no manual test writing for existing flows
- • Capture agent-to-service API calls in production and replay them in CI to ensure backend changes don't break existing agent integrations
- • Mock external service dependencies (databases, third-party APIs) automatically from recorded traffic for isolated testing
- • Test backend changes against real production traffic patterns without manually maintaining test fixtures
- • Generate regression test suites for AI agent backends by recording a diverse set of real interactions
Not For
- • Unit testing or front-end testing — Keploy focuses on API and integration testing at the network level
- • Teams needing manual, hand-crafted test scenarios with complex test logic — use Jest, Pytest, or Playwright for programmatic test control
- • Performance/load testing — Keploy captures functional correctness, not performance metrics
Interface
Authentication
Keploy runs as a local CLI tool — no auth for local operation. Keploy Cloud (if applicable) uses account-based auth. No API keys for the open-source local version.
Pricing
Apache 2.0 open source, free for local development. Keploy Cloud adds team collaboration and AI-powered test enhancement. Core testing functionality is free.
Agent Metadata
Known Gotchas
- ⚠ Keploy uses eBPF for traffic capture — requires Linux with kernel 5.4+ and appropriate privileges (root or CAP_NET_ADMIN); not compatible with macOS in production mode
- ⚠ Recorded tests include timestamps and unique IDs from captured requests — replay failures can occur if your application validates timestamps or generates non-deterministic responses
- ⚠ External API mocks are generated from recorded responses — if external APIs return different data between record and replay (time-based, random data), tests fail with mismatch
- ⚠ gRPC support is limited compared to REST/HTTP support — verify gRPC compatibility for agent services using gRPC protocols
- ⚠ Database mocking captures SQL queries and responses — schema changes between record and replay cause mock mismatches; re-record after significant schema changes
- ⚠ Docker networking mode required for container-based services — Keploy must run in the same network namespace as the service being tested
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Keploy.
Scores are editorial opinions as of 2026-03-06.